FIGURES 2–19 in New species of Stenopterobia (Bacillariophyta) from Colombia and Peru, and new nomenclatural transfers in Iconella

FIGURES 2–19. Stenopterobia caquetaensis sp. nov. LM (Figs 2–13) and SEM (Figs 14–19) images from type material LPC 5610-1. 2–13. Specimens in valve view showing size variation. 14. External view of a valve. 15. External view of a broken frustule, partially showing valve internal view. 16. Detail of the external valve view showing striae, transapical costae and raphe canal. Arrowheads point 2- seriate striae with a third row of marginal areolae. Arrow points a tetraseriate stria. 17. Tilted external view of the same specimen showing valve mantle and fenestrae. Arrow points a tetraseriate stria. 18. Internal valve view with detail of the striae and the ovoid, irregularly spaced portulae. Arrows point the hyaline area separating valve face striae from mantle striae. 19. Internal view of the valve apex. Scale bars: 1 µm (Figs 16–19), 10 µm (Figs 2–13), 20 µm (Figs 14–15).